pure substances and formulation

what is a pure substance

is a single element or compound, not mixed with any other substance.

what special about pure elements and compounds

Pure elements and compounds have fixed specific melting and boiling points

what can melting and boiling point data be used

Melting point and boiling point data can be used to distinguish pure substances from mixtures

what does a pure substance mean in every day language

In everyday language, a pure substance can mean a substance that has had nothing added to it, so it is unadulterated and in its natural state, eg pure milk.

what is formulation

a complex mixture that has been designed as a useful product. Many products are complex mixtures in which each chemical has a particular purpose

how are formulations made

by mixing the components in carefully measured quantities to ensure that the product has the required properties

examples of formulations

fuels, cleaning agents, paints, medicines, alloys, fertilisers and foods.

boiling and melting points of impure substances

impure substances melt and boil over a range of temperatures

in formulations, why are the quantity of each component carefully measured

so that the product has the properties we need